Sample resetting device for rock mass structural surface shear strength test
By designing a sample reset device for the shear strength test of rock mass structure surfaces, the problem of inaccurate resetting and complex operation of large rock mass samples in the prior art is solved, and high-precision and safe sample reset is achieved, reducing experimental costs and safety risks.
Patent Information
- Application Number
- CN202421809075.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-29
AI Technical Summary
In the shear strength test of large rock structure surfaces, existing rock direct shear instruments have inaccurate reset, complex operation and poor repeatability, which affects the accuracy of the test results and increases the experimental cost.
A sample reset device for the shear strength test of rock structure surface is designed, including a reaction seat, push plate, power device and reaction grid member. The push plate is pushed to move through the power device, and the push plate is in contact with the upper disk sample to achieve sample reset, and the position of the reaction seat is adjusted to adapt to the sample size and position.
It improves the positioning accuracy and repeatability of sample reset, reduces manpower operation, ensures the safe placement of the sample, reduces the risk of laboratory safety accidents, and improves the universality and use scenarios of the device.
Smart Images
Figure CN223005860U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of geotechnical rock loading systems, in particular to a sample resetting device for shear strength tests of rock mass structural planes. Background Technique
[0002] At present, the research on the size effect of the shear strength of rock structural planes mainly adopts indoor direct shear tests. In terms of indoor direct shear tests, generally, a conventional small direct shear instrument is used and a relatively high similarity ratio test of 5 to 40 times is adopted to study the size effect of the shear strength of structural planes. However, for some existing rock direct shear instruments and the sizes of the tested samples, there is generally a situation where the sample sizes are too small or the specifications are too few, and the test results of the size effect of the rock mass structural plane are difficult to reflect the true size effect of the shear strength of the rock mass structural plane. Therefore, more and more researchers are conducting large-size shear strength tests of rock mass structural planes. The shear strength test of the rock mass structural plane generally applies a tangential load under different normal loads to study its shear strength, which requires repeated tests on the same group of samples to ensure that their structural planes are basically the same. And one of the key technologies is how to reset the upper plate sample and at the same time ensure its reset accuracy.
[0003] Currently, the resetting of large rock mass samples still mainly relies on resetting methods such as manual hoisting. When resetting large rock mass samples, problems such as inaccurate positioning, complex operation, and poor repeatability may be faced. This not only affects the accuracy of the test results, but may also cause damage to the samples, increase the experimental cost, and large rock mass samples are often heavy and large in size, and improper handling and installation may pose a safety threat to researchers. Content of the Utility Model
[0004] The purpose of the utility model is to provide a sample resetting device for shear strength tests of rock mass structural planes to solve the problems existing in the above-mentioned prior art, which is convenient to use and can improve the use safety.
[0005] To achieve the above purpose, the utility model provides the following scheme:
[0006] The utility model provides a sample resetting device for shear strength tests of rock mass structural planes, including a reaction seat, a push plate, a power device, and a reaction grid member. The reaction seat is arranged on the reaction grid member, and the position of the reaction seat on the reaction grid member can be adjusted. The power device is arranged on the reaction seat, and the power device is in transmission connection with the push plate. The power device can push the push plate to move, and the push plate is used to contact the upper plate sample and push the upper plate sample to move.
[0007] Preferably, it further includes at least two guide rods. At least two guide sleeves are fixedly arranged on the reaction force seat. The number of the guide sleeves is equal to that of the guide rods. Each of the guide rods passes through each of the guide sleeves. The outer side walls of the guide rods are in contact with the inner side walls of the guide sleeves. The center lines of the guide rods are parallel to the moving direction of the push plate. One end of each of the guide rods is fixedly connected to the push plate.
[0008] Preferably, the power device includes a power cylinder and a power rod. The power cylinder can drive the power rod to move. The power cylinder is fixedly connected to the reaction force seat. The end of the power rod far from the power cylinder is fixedly connected to the push plate. The movement of the power rod can push the push plate to move.
[0009] Preferably, it further includes at least two first walking wheels and at least two connecting disks. At least two receiving grooves are formed on the bottom surface of the reaction force seat. The number of the receiving grooves, the first walking wheels and the connecting disks is equal. Each of the first walking wheels is used to be placed in each of the receiving grooves. Each of the connecting disks and each of the first walking wheels are respectively connected by an adjusting bolt. Tightening the adjusting bolt can make the connecting disk press against the reaction force seat and make the first walking wheel protrude from the bottom surface of the reaction force seat. Loosening the adjusting bolt can make the first walking wheel retract into the receiving groove.
[0010] Preferably, it further includes at least two fixing bolts. Each of the fixing bolts can fix the reaction force seat to the reaction force grid member.
[0011] Preferably, it further includes at least one second walking wheel. The second walking wheel is arranged on the power cylinder. The second walking wheel can be in contact with the reaction force grid member when the first walking wheel protrudes from the bottom surface of the reaction force seat and is disengaged from the reaction force grid member when the reaction force seat is fixed to the reaction force grid member.
[0012] Preferably, it further includes at least two guide wheels. The reaction force grid member has a number of guide rails. Each of the guide wheels is connected to the bottom surface of the reaction force seat. Each of the guide wheels can roll along each of the guide rails.
[0013] Preferably, the power cylinder is a double-acting oil cylinder.
[0014] The utility model has achieved the following technical effects compared with the prior art:
[0015] The sample reset device for the shear strength test of rock mass structural planes provided by the present utility model realizes the movement of the push plate through a power device, and realizes the movement of the upper plate sample through the push plate to adapt to the size of the upper plate sample. The position of the reaction seat on the reaction grid member can be adjusted to adapt to the position and size of the upper plate sample. It not only has a simple design, but also is convenient to operate, with a high degree of automation. It can improve the accuracy and repeatability of reset positioning, effectively reduce manual operation, ensure the safe placement of the upper plate sample through mechanized and automated means, reduce the risk of laboratory safety accidents, and improve the versatility and expand the usage scenarios. Description of the Drawings
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0017] Figure 1 Schematic diagram of the sample reset device for the shear strength test of rock mass structural planes provided by the present utility model;
[0018] Figure 2 For Figure 1 Schematic diagram of the structure on the reaction seat in
[0019] Figure 3 For Figure 2 Another direction schematic diagram of the structure on the reaction seat of
[0020] Figure 4 Schematic diagram of a typical loading scheme for the shear strength test of rock mass structural planes;
[0021] Figure 5 For Figure 4 Schematic diagram of the position of the upper plate sample after movement after loading in
[0022] Figure 6 Schematic diagram of a typical sample reset scheme for the shear strength test of rock mass structural planes;
[0023] Figure 7 For Figure 6 Schematic diagram of the position of the upper plate sample after reset in
[0024] In the figure: 1 - reaction seat, 2 - power device, 3 - guide rod, 4 - guide sleeve, 5 - push plate, 6 - first walking wheel, 7 - fixing bolt, 8 - connecting plate, 9 - adjusting bolt, 10 - guide wheel, 11 - second walking wheel, 12 - reaction grid member, 13 - receiving groove. Detailed Embodiments
[0025] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
[0026] The purpose of the present invention is to provide a sample reset device for the shear strength test of rock mass structural planes, so as to solve the problems existing in the above-mentioned prior art, facilitate use, and improve the safety of use.
[0027] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0028] As Figures 1-7 shown, the present invention provides a sample reset device for the shear strength test of rock mass structural planes, including a reaction seat 1, a push plate 5, a power device 2, and a reaction grid member 12. The reaction seat 1 is arranged on the reaction grid member 12, and the position of the reaction seat 1 on the reaction grid member 12 can be adjusted. The power device 2 is arranged on the reaction seat 1, and the power device 2 is in transmission connection with the push plate 5. The power device 2 can push the push plate 5 to move, and the push plate 5 is used to contact the upper plate sample and push the upper plate sample to move.
[0029] The sample reset device for the shear strength test of rock mass structural planes provided by the present invention realizes the movement of the push plate 5 by the power device 2, realizes the movement of the upper plate sample by the push plate 5 to adapt to the size of the upper plate sample, and realizes the adaptation to the position and size of the upper plate sample by the adjustable position of the reaction seat 1 on the reaction grid member 12. It not only has a simple design, but also is convenient to operate, with a high degree of automation. It can improve the accuracy and repeatability of reset positioning, effectively reduce manual operation, ensure the safe placement of the upper plate sample through mechanical and automated means, reduce the risk of laboratory safety accidents, and improve the versatility and expand the use scenarios. It should be noted here that the specific form of the reaction seat 1 is not limited, as long as it can bear the reaction force of the power device 2.
[0030] As Figures 4-5 shown, after the formal start of the test, as the tangential force increases, the upper plate sample will gradually move until the test is completed. After the test is completed, the upper plate sample needs to be reset to the initial position. As Figures 6-7 shown, by contacting or connecting the push plate 5 with the upper plate sample, the upper plate sample is pushed and its position is aligned. Subsequently, the upper plate sample is reset to the initial position, and the next group of tests can be started; among them Figure 4It represents a typical loading scheme for the shear strength test of rock mass structural planes. It does not represent all test methods, and is only described as a typical loading scheme for illustration purposes. Figure 6 It is a typical specimen resetting scheme for the shear strength test of rock mass structural planes. It does not represent all resetting methods, and is only described as a typical resetting scheme for illustration purposes.
[0031] Furthermore, the specimen resetting device for the shear strength test of rock mass structural planes provided by the present utility model further includes at least two guide rods 3. At least two guide sleeves 4 are fixedly provided on the reaction force seat 1. The number of guide sleeves 4 is equal to the number of guide rods 3. Each guide rod 3 passes through each guide sleeve 4. The outer side walls of the guide rods 3 are in contact with the inner side walls of the guide sleeves 4. The center lines of the guide rods 3 are parallel to the moving direction of the push plate 5. One end of each guide rod 3 is fixedly connected to the push plate 5, which can effectively prevent the push plate 5 from rotating and improve the smoothness and accuracy of the movement of the push plate 5.
[0032] Furthermore, the power device 2 includes a power cylinder and a power rod. The power cylinder can drive the power rod to move. The power cylinder is fixedly connected to the reaction force seat 1. The end of the power rod far from the power cylinder is fixedly connected to the push plate 5. The movement of the power rod can push the push plate 5 to move. The structure is simple and convenient to use.
[0033] Furthermore, the specimen resetting device for the shear strength test of rock mass structural planes provided by the present utility model further includes at least two first walking wheels 6 and at least two connecting plates 8. At least two receiving grooves 13 are formed on the bottom surface of the reaction force seat 1. The number of the receiving grooves 13, the first walking wheels 6 and the connecting plates 8 is equal. Each first walking wheel 6 is used to be placed in each receiving groove 13. Each connecting plate 8 and each first walking wheel 6 are respectively connected by an adjusting bolt 9. Tightening the adjusting bolt 9 can make the connecting plate 8 press tightly on the reaction force seat 1 and make the first walking wheel 6 protrude from the bottom surface of the reaction force seat 1. Loosening the adjusting bolt 9 can make the first walking wheel 6 retract into the receiving groove 13. When it is necessary to move the reaction force seat 1, tighten the adjusting bolt 9, the first walking wheel 6 protrudes from the bottom surface of the reaction force seat 1, the first walking wheel 6 directly contacts the reaction force grid member 12, the bottom surface of the reaction force seat 1 is separated from the reaction force grid member 12, and the reaction force seat 1 can be pushed to the required position. After the movement of the reaction force seat 1 is completed, loosen the adjusting bolt 9, the first walking wheel 6 retracts into the receiving groove 13, and the bottom surface of the reaction force seat 1 falls back onto the reaction force grid member 12.
[0034] Furthermore, the specimen resetting device for the shear strength test of rock mass structural planes provided by the present utility model further includes at least two fixing bolts 7. Each fixing bolt 7 can fix the reaction force seat 1 on the reaction force grid member 12. The structure is simple and convenient for installation.
[0035] Further, the specimen resetting device for the shear strength test of rock mass structural planes provided by the present utility model further includes at least one second traveling wheel 11. The second traveling wheel 11 is arranged on the power cylinder. When the first traveling wheel 6 protrudes from the bottom surface of the reaction seat 1, the second traveling wheel 11 can contact the reaction lattice member 12 to facilitate the movement of the reaction seat 1 and the power cylinder, and disengages from the reaction lattice member 12 when the reaction seat 1 is fixed on the reaction lattice member 12.
[0036] Further, the specimen resetting device for the shear strength test of rock mass structural planes provided by the present utility model further includes at least two guide wheels 10. The reaction lattice member 12 is provided with a plurality of guide rails. Each guide wheel 10 is connected to the bottom surface of the reaction seat 1. Each guide wheel 10 can roll along each guide rail, which can effectively prevent the reaction seat 1 from deviating and improve the smoothness and accuracy of the movement of the reaction seat 1.
[0037] As a relatively preferred implementation manner of this embodiment, the power cylinder is a double-acting oil cylinder. The push plate 5 is preferably but not limited to being hydraulically driven, and the corresponding specific control method can be selected according to actual needs. The supporting hydraulic system and control system can both be determined according to actual needs, and can be but not limited to using servo control or open-loop control. Load sensors and displacement sensors can also be installed according to needs.
[0038] Specific examples are used in the present utility model to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A sample resetting device for shear strength test of rock mass structural surface, characterized by: It includes a reaction force seat, a push plate, a power device and a reaction force grid component. The reaction force seat is arranged on the reaction force grid component. The position of the reaction force seat on the reaction force grid component can be adjusted. The power device is arranged on the reaction force seat. The power device is transmission-connected with the push plate. The power device can push the push plate to move. The push plate is used to contact with the upper plate sample and push the upper plate sample to move.
2. The sample resetting device for rock mass structural surface shear strength test according to claim 1 is characterized in that: It also includes at least two guide rods, at least two guide sleeves are fixedly provided on the reaction seat, the number of the guide sleeves is equal to the number of the guide rods, each of the guide rods passes through each of the guide sleeves, the outer wall of each of the guide rods contacts the inner wall of each of the guide sleeves, the center line of each of the guide rods is parallel to the moving direction of the push plate, and one end of each of the guide rods is fixedly connected to the push plate.
3. The sample resetting device for rock mass structural surface shear strength test according to claim 1 is characterized in that: The power device includes a power cylinder and a power rod. The power cylinder can drive the power rod to move. The power cylinder is fixedly connected to the reaction seat. One end of the power rod away from the power cylinder is fixedly connected to the push plate. The movement of the power rod can push the push plate to move.
4. The sample resetting device for rock mass structural surface shear strength test according to claim 3 is characterized in that: It also includes at least two first running wheels and at least two connecting plates, at least two accommodating grooves are opened on the bottom surface of the reaction seat, the number of the accommodating grooves, the first running wheels and the connecting plates are equal, each of the first running wheels is used to be placed in each of the accommodating grooves, and each of the connecting plates is connected to each of the first running wheels by an adjusting bolt respectively; tightening the adjusting bolt can press the connecting plate against the reaction seat and make the first running wheel protrude from the bottom surface of the reaction seat, and loosening the adjusting bolt can retract the first running wheel into the accommodating groove.
5. The sample resetting device for rock mass structural surface shear strength test according to claim 4 is characterized in that: It also includes at least two fixing bolts, each of which can fix the reaction seat on the reaction grid component.
6. The sample resetting device for rock mass structural surface shear strength test according to claim 5 is characterized in that: It also includes at least one second running wheel, which is arranged on the power cylinder. The second running wheel can contact the reaction grid component when the first running wheel protrudes from the bottom surface of the reaction seat, and can be separated from the reaction grid component when the reaction seat is fixed on the reaction grid component.
7. The sample resetting device for rock mass structural surface shear strength test according to claim 4 is characterized in that: It also includes at least two guide wheels. The reaction grid component is provided with a plurality of guide rails. Each of the guide wheels is connected to the bottom surface of the reaction seat, and each of the guide wheels can roll along the guide rails.
8. The sample resetting device for rock mass structural surface shear strength test according to claim 3 is characterized in that: The power cylinder is a double-acting oil cylinder.